On 13/09/18 15:05, Ming Lei wrote: > On Thu, Sep 13, 2018 at 02:28:48PM +0300, Adrian Hunter wrote: >> blk-mq does not support runtime pm, so disable blk-mq support for now. > > So could you describe a bit what the issue you are trying to fix?
UFS is a low-power solution, so we must be able to runtime suspend. > > This is host level runtime PM you are trying to address, and if blk-mq > runtime isn't enabled, I guess the host won't be runtime suspended at all > because some of its descendant are always active. > > So seems we need to do nothing for preventing the host controller from > entering runtime suspend. We don't want to prevent the host controller from runtime suspending, quite the opposite.
